The Comparative Sealing Ability of Hydroxyapatite Cement, Mineral Trioxide Aggregate, and Super Ethoxybenzoic Acid as Root-End Filling Materials

Abstract

A comparison was made of the ability of hydroxyapatite cement, mineral trioxide aggregate, and super ethoxybenzoic acid to prevent the leakage of bacteria from root canals, when used as root-end filling materials. The materials were tested in a double-chamber device in which a root segment connects the upper (delivery) chamber and the lower (receiving) chamber. The root segment was prepared by having the root canal instrumented to a #45 file, and a 3-mm-deep, root-end preparation placed at the apical foramen. The canal of each root segment was filled with gutta-percha, and the root-end preparation was filled with one of three test materials, mixed according to the manufacturer's directions. Negative controls were constructed with sticky wax sealing the apical foramen. A titered suspension of radioactively (3H-thymidine)-labeled bacteria (Enterococcus fecalis) was placed into the delivery chamber, and sterile saline was placed into the receiving chamber such that the apical third of each root section was immersed. At various time points, samples were taken from the receiving chamber, and measured for 3H activity. The results indicated that (a) all the test materials leaked significantly compared with the negative controls; and (b) there was no significant difference found between the leakage rates of the three materials tested.

Physicochemical Basis of the Biologic Properties of Mineral Trioxide Aggregate

“…Because MTA releases Ca ions and contributes to the formation of HA in synthetic biologic fluids, its favorable biologic properties are thus not surprising. In this context, it is worth noting that several materials, namely Ca(OH) 2 , calcium phosphate cements, hydroxyapatite cement, and Portland cement elicit biologic responses essentially similar to that of MTA (33)(34)(35)(36)(37). It appears from the preceding discussion that this similarity in their mode of biologic action stems from one common characteristic they all possess: their propensity to release Ca and ability to form HA.…”

Cimentos biocerâmicos em endodontia: revisão de literatura

“…A maioria dos estudos buscou comparar as propriedades de cimentos endodônticos biocerâmicos com cimentos endodônticos convencionais e com o MTA, encontrando evidências consideráveis que apoiam esse material como padrão-ouro para vários procedimentos clínicos [35][36][37][38] . Um material ideal utilizado para reparo endodôntico deve ser biocompatível, radiopaco, antibacteriano, dimensionalmente estável, fácil de manipular, além disso, não deve ser afetado pela contaminação sanguínea 10 .…”

Current status of direct pulp-capping materials for permanent teeth

“…A bacterial microleakage model study showed: composite resin (Prisma TPH, Dentsply Caulk)<amalgam+bonding agent (Probond Primer & Adhesive, Dentsply Caulk)<EBA, amalgam and MTA 92) . Another bacterial leakage study indicated that MTA and EBA leaked, and that leakage increased with time 93) . The results of a fluid transport model study were: AH26 (Dentsply Maillefer, Ballaigues, Switzerland) (negative control)<<MTA<glass-ionomer cement<EBA<amalgam 94) .…”